Julius l



Nrrnn STATES P TENT STEAM DAM PER REGULATOR.

SPECIFICATION forming part of Letters Patent No. 296,568, dated April 8.1884.

Application filed August 16, 1853. (No model.)

To all whom it may concern:

Be it known that I, J ULrUs L. Honnre, of Jersey City, in the county ofHudson and State of New Jersey, have invented a certain new and usefulImprovement in Steam-Damper Regulators, of which the following is aspecification. V

The object I have in view is to produce a damper-regulator forsteam-boiler furnaces which will be simple in construction and efficientand certain in operation. To accomplish this object I provide properconnections between the damper of a steam-boiler furnace and asteam-motor which is worked in both directions by the steam-pressure,and this motor is controlled by a piston, puppet,

or other valve, which is moved by the pressme of the steam directlythereon, opposed by a suitable counter-balance, preferably madeadjustable to change and adjust the valve to work at differentpressures. The steam-motor is of peculiar construction, it being adifferential motor, consisting of opposing moving steam-pressuresurfaces of differentareas, the surface of smaller area being subjectedconstantly to the steam-pressure and keeping the damper normally open,while the steampressure upon the larger surface is controlled by thevalve. These opposing steam-pressure surfaces are preferably in the formof two plungers projecting into two steam-chambers and made in onepiece, or connected directly together and to one end of a pivoted leverconnected with the damper, or the opposing plungers may be separateparts'connected to such lever on opposite sides of its pivot and actingoppositely thereon. The chamber in which the small plunger works isconnected directly with the steam-space of the boiler, and is subjectconstantly to the boiler-pressure. A. passage connects this firststeamchamber with the second steam-chamber, or that in which works theplunger of larger area. This passage is kept closed, when theboilerpressure is normal, by a piston,-pnppet, or other form of valve,upon which the steam acts directly, and provided with an adjustablecounter-balance overcoming the normal steampressure. .Vhen this pressureis exceeded,

however, the valve is moved and the passage exposed for the samepurpose.

between the two steam chambers opened, ad mitting steam into the secondchamber and producing a steam-pressure upon both plungers. Adifferential action takes place, the plunger with larger area overcomingthat with smaller area, moving the pivoted lever and closing the damper.When the steam-pressure is again reduced to normal conditions, thecounterbalance overcomes the steam-pressure and thevalveis moved intheopposite direction, closing the passage between the steam-chambers.The condensation of the steam will relieve the pressure on largerplunger, permitting the smaller plunger to move the lever in theopposite direction, and even assisting this movement by the partialvacuum which is produced by the condensation. The damper is thus opened,as it was closed, by the positive action of the steampressure throughthe diiferential motor. To produce quicker ac tion, if desirable, themovement of the valve to close the passage connecting the steam-chambersmay also open a shifting-passage from the second steam-chamber into theair, permitting the escape of the confined steam in the-secondsteam-chamber and instantly relieving the pressure upon the largerplunger. The counter-balance of the valve may be a weight adjustableupon a lever pivoted to the outside of the shell of the device andconnected with the valve, or a spring may be used made adjustable by ascrew-cap, through which passes loosely the stem of the valve. Thispermits, as with the exposed lever, of the movement of the valve by handin case it should stick in its case. The lever to which the plungers areattached is The case containing the parts of the device may be cast inone or more pieces. The plungers and the valve app simply fitted to thepassages in which they move, no stuffing-boxes or packing being used,and hence the regulator is sensitive in its action, the movement notbeing retarded by the friction caused by such devices. The leakage ofsteam is inconsiderable, and cannot affect the relative or differentialaction of the plungers, since the steam flows constantly into one orboth chambers of the regulator. The lever and damper connections arecounterbalanced by the plungers or by other means,

I controlling piston-valve G. The plungers E 2o to make the movementuniform in both directions and more sensitive.

In the accompanying drawings, forming a part hereof, Figure 1 is avertical section of a steam-damper regulator embodying my invention,connections with the steam-space of boiler and the damper being shown;Fig. 2, a similar view'of a modified vform of the apparatus; and Fig. 3,a sectional view, showing a spring counter-balance.

Like letters denote corresponding parts in all three figures.

A is a case or shell inclosing three chambers, B, O, and D. The chambersBand C are steam-chambers, in which work the steamplungers E F, ofdifferent areas, forming the differential motor, while chamber D isintermediate between B and O, and contains the F may be made in onepiece, and be slotted to receive the head of the lever H, pivoted to theshell A, in which case the steam-chambers B 0 will be located one abovethe other, or such plungers may be separate, as shown in Fig. 2, and beconnected by links a b with lever H, on opposite sides of its pivot, thesteamchambers B 0 being arranged horizontally instead of vertically. Thelever H is connected by link 0 with arm (Z on the shaft of damper I,located in the furnace-flue J, or any other suitable connections may beemployed.

K is the steam-space of the boiler, and a pipe, 0, leads thence to thechamber B of the regulator. The valve-chamber D opens into steam-chamberB, and the piston-valve G is subject constantly at its lower end to thesteam-pressure in chamber 13. The connection between an opening, f,leading into the second chamber, 0, and a passage, 9, in the valve G, isclosed by the valve when at the lower limit of its movement; but whenthe valve is raised by the steam-pressure the opening f is brought intoline with the passage g through the valve and the steam-chambers B and Oare connected. A snifting-passage, h, may be provided, which is broughtinto line with the opening f wh e11 the valve is depressed. Thepiston-valve is counterbalanced by a weight, h, and exposed pivotedleveri upon which the weight is adjustable, such lever being connectedto the valve-stem, so that the valve can be moved by hand by moving thelever. The plungers can also be moved by hand by moving the leverInstead of a weight for the counter-balance, a spring, 70, Fig. 3, maybe used, adjusted by ascrew-cap, Z. Thevalve-stemmpasses loosely throughcap Z, so that the valve can be moved by hand in case it should stick inits chamber.

\Vith the construction shown in Fig. 1 the weight of the two plungers isintended to counterbalance or nearly counterbalance the long arm of thelever and connecting parts, so that the operation will be uniform inboth directions and be more sensitive, and with theattached to a cordpassing. over a sheave and connected with the longarm of the lever, or aspring suitably arranged.

It is evident that, without departing from the spirit of my invention,the piston-valve of the regulator may be arranged to act in the reversemanner to that described, the valve normally connecting bothsteam-chambers and keeping the damper open by the preponderance of thelarger plunger and an increase of steam-pressure above the normalcausing the passage between the two steam-chambers to be cut off and thedamper to be closed by steam-pressure upon the smaller plunger.

Vhat I claim is- 1. In a steam-damper regulator, the combination, withdamper-connections, of a steammotor working the damper and moved in bothdirections by steam-pressure, and a valve controlling the motor andacted upon directly by the steam-pressure, substantially as set forth. I

2. In a steam-damper regulator, the combination, withdamper-connections, of a steammotor working the damper and moved in bothdirections by steanrpressure, avalve 0011-.

trolling the motor and acted upon directly by the steam-pressure, and acounter-balance, substantially as set forth.

3. In a steam-damper regulator, the combination, withdamper-connections, of a steammotor working the damper and moved in bothdirections by steam-pressure, a valve controlling the motor and actedupon directly by the steam-pressure, and an adjustable counterbalance,substantially as set forth.

4. The combination,with a steam-boiler-furnace damper, of a differentialsteam motor connected with the boiler, and connections between themwhereby said damper is operated by variations in the steam-pressure,substantially as set forth.

5. In a steam-damper regulator, the combination, withdamper-connections, of the opposing plungers of different areas, thesteamchambers containing said plungers, a constant steam-connection withthe chamber having smaller plunger, and means for opening and closing asteam-connection with the chamber having larger plunger, controlled byvariations in steam-pressure, substantially as set forth.

6. In a steam-damper regulator, the combination, withdamper-connections, of opposing plungers of different areas and thevalve controlling the admission of steam to the plungers, substantiallyas set forth.

7 i In a steam-damper regulator, the combil tial motor, the valve, andthe snifting-passage, 1o nation, with damper-connections, of theopsubstantially as set forth.

posing plungers of diti'erenh areas, a steam- This specification signedand witnessed this oonnectionwith'the chamber having; smaller 14th dayof August, 1883. a 5 pion er, and a valve openin and olosin a connectionbetween the oha ibers, substZ-n- JULIUS HORNIG tially as set forth.Witnesses:

8. In a steam-damper regulator, the combi- \VM. H.1IEADO'WCROFT,

nation, with dampeneonnect-ions, of differen- I EDWARD H. PYATT.

